This is not our API. This repository is an independent, third-party profile of a company's publicly available API surface, maintained by API Evangelist. API Evangelist does not operate, host, resell, or support this company's APIs, and is not affiliated with or endorsed by the company unless stated on the profile.
Where the information came from. Everything here is assembled from material a member of the public can reach with a browser and no credentials — the company's own website, developer portal and documentation, the specifications it publishes for public use (OpenAPI, AsyncAPI, JSON Schema,
apis.json,llms.txtand similar), its public repositories, and its public status, pricing and changelog pages. Nothing here is obtained by breaching a system, defeating an access control, or using credentials of any kind.The rating is an independent assessment. The Kin Score and Agent Readiness rating are independently calculated scores of a company's public API artifacts, produced by API Evangelist against a published rubric. They are not certifications, endorsements, security assessments, or audits, and they score published artifacts — not the quality, safety, or security of the software.
Corrections, re-scores, and removal are free. No partnership, contract, or purchase is required, and you do not need to justify the request.
- Something wrong? Open an issue on this repository, or email info@apievangelist.com.
- Published something new? Ask for a re-score and we will re-run the rating.
- Want the listing taken down? Say so and we will honor it. The profile is reduced to your company name, a factual description, and a link to your own site, and the company is recorded as unrated — never scored zero for having asked.
Response times. Acknowledgement within one business day; removal or restriction within two business days; corrections and re-scores within five business days.
On a security or compliance team? Email info@apievangelist.com with security in the subject line and you will get a person, not a form. We will tell you exactly which public URLs this profile was built from so your team can see the same surface we did, and we will take the listing down on request while you work through it.
Full detail: Where this data comes from
Form3 is a United Kingdom-headquartered, cloud-native payments technology company offering account-to-account payment processing as a single, unified REST API to banks and fintechs. Founded in 2016 and based in London, Form3 runs a fully managed Payments-as-a-Service platform connecting customers to domestic and cross-border schemes — UK Faster Payments, Bacs and CHAPS, SEPA Credit Transfer, SEPA Instant and SEPA Direct Debit, and US instant rails — alongside Confirmation of Payee / Verification of Payee name-checking, direct debit mandate management, scheme-addressable account identification, event notifications (webhooks), and full audit trails.
The public API is REST built on the json:api specification, documented at api-docs.form3.tech with a downloadable Swagger 2.0 definition (host api.form3.tech, basePath /v1, 163 paths). Authentication is OAuth2 client-credentials plus HTTP Message Signatures request signing, with mutual TLS supported in some environments. Form3 is API-native and developer-facing, but is a regulated B2B rail rather than an open self-serve signup product — production access is contracted.
APIs.json: https://raw.githubusercontent.com/api-evangelist/form3/refs/heads/main/apis.yml
- Payments
- United Kingdom
- Payment Processing
- Account-to-Account
- Real-Time Payments
- Faster Payments
- Bacs
- SEPA
- Direct Debit
- Confirmation of Payee
- Cross-Border
- Banking-as-a-Service
- Embedded Payments
- Created: 2026-07-24
- Modified: 2026-07-24
The unified Form3 Public API — a single REST API built on the json:api specification that connects banks and fintechs to domestic and cross-border payment schemes. Swagger 2.0, 163 documented paths.
- Human URL: https://www.api-docs.form3.tech/
- Base URL:
https://api.form3.tech/v1 - OpenAPI
- API Reference
- Getting Started
Send and receive account-to-account payments across UK Faster Payments, Bacs, CHAPS, SEPA and US instant rails, and handle exceptions (rejections, returns, reversals, recalls).
- Human URL: https://www.api-docs.form3.tech/api/tutorials/getting-started/send-a-payment
- Base URL:
https://api.form3.tech/v1 - OpenAPI
Originate and receive Bacs and SEPA direct debits, manage mandates, and process indemnity claims.
- Human URL: https://www.api-docs.form3.tech/api/tutorials/bacs/direct-debit-instructions-for-originators
- Base URL:
https://api.form3.tech/v1 - OpenAPI
Generate scheme-addressable account numbers, validate UK sort code / account number pairs, and run Confirmation of Payee / Verification of Payee name-checking.
- Human URL: https://www.api-docs.form3.tech/api/tutorials/confirmation-of-payee/cop-tutorial
- Base URL:
https://api.form3.tech/v1 - OpenAPI
Submit and receive bulk payment instructions and scheme messages as files (Transaction File / Scheme File).
- Human URL: https://www.api-docs.form3.tech/api/tutorials/bacs/send-transactions-in-a-file
- Base URL:
https://api.form3.tech/v1 - OpenAPI
Subscribe to and receive signed event notifications (webhooks) for payment and platform lifecycle events, and verify them.
- Human URL: https://www.api-docs.form3.tech/api/tutorials/event-notifications/subscriptions-for-event-notifications
- Base URL:
https://api.form3.tech/v1 - OpenAPI
Manage users, roles, access-control entries and public keys under a flexible security and approval model, and read audit trails and platform metrics.
- Human URL: https://www.api-docs.form3.tech/api/tutorials/security/create-a-read-only-user
- Base URL:
https://api.form3.tech/v1 - OpenAPI
- Website
- Developer Portal
- API Reference
- Getting Started
- GitHub Organization
- Postman
- Status Page
- Blog
- Terms of Service
- Privacy Policy
FN: Kin Lane Email: kin@apievangelist.com